Calculate the freezing point depression and boiling point elevation of a solution of 10.0g of urea ($M_B $= 60) in 50.0g of water at 1 atm. pressure. $K_b$ and $K_f $for water 0.52$^{\large\circ}C m^{−1}$ and
1.86$^{\large\circ}C m^{−1 }$respectively.